Any suggestions?anyone here done this? And,,,it will be temporary,vehicle is just starting and the rotating assembly will be used for a 383 in a couple of years.I have a 305 in a vehicle that I don't use so I thought I would build this,,,get suspension,traction,bugs worked out and then in a couple years go 383. Will probably order a Scat rotating assembly. Will I need to have the 400 crank,rods,balancer,flexplate balanced by a machine shop? Any other suggestions???